Define private members with obj.__private. See example below to see how it works.

Example

Define your class with a private member.

var __private = require("obj.__private");

function MyClass() {
	__private.definePrivateObject(this);

	__private(this).privateNumber = 42;
}

MyClass.prototype.coolFunction = function() {
	__private(this).privateNumber *= 2;
	return __private(this).privateNumber;
};

Later in another .js file

var a = new MyClass;
a.privateNumber; // undefined

a.coolFunction() // 84

// If you try to access it with your own __private module
// You cant.

var __private = require("obj.__private");

__private(a).privateNumber; // Uncaught ReferenceError
__private(a); // undefined

The idea is to define all methods that can access your private members in one .js file. Everytime you do require("obj.__private") it creates a unique namespace for your private members.